6/3/2019 1 House Transportation Appropriations Committee May 23, 2019 Matthew J. Chynoweth, MDOT Chief Bridge Engineer • MDOT Bureau of Bridges and Structures • Bridge Regulations, Funding, and Asset Management • Bridge Design • Bridge Construction • Bridge Innovations/Achievements • Local Agency Bridge Bundling Initiative • Challenges and the future 1 2
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2019 House Transportation Appropriations Committee ...€¦ · House Transportation Appropriations Committee May 23, 2019 ... highway bridges located on public roads that are fully
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House Transportation Appropriations Committee May 23, 2019Matthew J. Chynoweth, MDOT Chief Bridge Engineer
• MDOT Bureau of Bridges and Structures• Bridge Regulations, Funding, and Asset Management• Bridge Design• Bridge Construction• Bridge Innovations/Achievements• Local Agency Bridge Bundling Initiative• Challenges and the future
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BOBS Vision and Values
Vision:
To be well-regarded as spanning and connecting lives, safely and efficiently
Bureau Strategic Objectives
Reduction in the
number of MDOT scourcritical bridges, through the use of new technology, mitigation
techniques, and
managing the riskprofile on an individual
project basis…
Improve initial bridge
and structure design,
fabrication and
constructionquality on all projects,
while focusing on constructability and lifecycle
durability and resiliency.
Overall structural expertise proficiency
in the bridge design and
construction areas,
along with knowledge management, leadership
development, and an overall broad perspective of “bridge
number of open Bridge Requests for Action (RFA), and
annual utilization of the Bridge Priority Preservation Funding (BPPF) template in achievement of condition
goals.
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Code of Federal Regulations:§ 650.307 Bridge inspection organization.
(a)Each State transportation department must inspect, or cause to be inspected, all highway bridges located on public roads that are fully or partially located within the State's boundaries, except for bridges that are owned by Federal agencies.
(c) Each State transportation department or Federal agency must include a bridge inspection organization that is responsible for the following:
(1) Statewide or Federal agency-wide bridge inspection policies and procedures,quality assurance and quality control, and preparation and maintenance of a bridge inventory.
(2)Bridge inspections, reports, load ratings and other requirements of thesestandards.
Code of Federal Regulations:§ 650.315 Inventory.
(a) Each State or Federal agency must prepare and maintain an inventory of all bridges subject to the NBIS. Certain Structure Inventory and Appraisal (SI&A) data must be collected and retained by the State or Federal agency for collection by the FHWA as requested. A tabulation of this data is contained in the SI&A sheet distributed by the FHWA as part of the “Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges,” (December 1995) together with subsequent interim changes or the most recent version. Report the data using FHWA established procedures as outlined in the “Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation's Bridges.”
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Our State’s Bridges:
Count Area ADT Count Area ADT
Local 6,633 18,229,259 17,305,522 226 2,469,926 4,780,655
Bridge Design• National Design Truck weight = 36 tons
• MDOT design truck = 1.2 * 36 tons = 45 tons
• MDOT has been designing bridges for heavier truck loads since the 1970’s
• Typically 5% - 10% additional construction cost
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Bridge Construction
•Accelerated Bridge Construction Projects
•Complex Bridge Construction Projects
US-131 over 3 Mile Road Bridge Slide
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M-50 over I-96
Bridge Slide
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M-50 over I-96
Bridge Slide
Zilwaukee Bridge
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Jack locations change the bearing location and designed load flow path
Pier diaphragms are overstressed upon application of jacking
Finite model analysis was used to determine additional compression needed in segments to not exceed principle tensile stresses during jacking
Zilwaukee Bridge
Additional transverse post tensioning is needed near the centroid of the pier diaphragm
Additional compression is also required at the top of the pier column to confine the tension tie that develops from the center of the jacking plates to the center of the column
Zilwaukee Bridge
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Zilwaukee Bridge
Zilwaukee Bridge
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Zilwaukee Bridge
Zilwaukee Bridge
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Zilwaukee Bridge
Project statistics:
Original negotiated contract cost = $35,974,257 Final contract cost = $35,993,783 Total net change amount = $19,526 Total net change = 0.05%
Cored 1464 holes in the NB & SB structures, nicked 1 wire of a 12 strand post tensioning tendon near Pier 22S, which resulted in a 0.21% reduction in capacity at that location – negligible
300 RFIs and material submittals
Expansion hinge lifts – 3 million lbs, 16 times Pier lifts – 10 million to 15 million lbs, 49 times
1.2 million lbs of structural steel (plates, PT bars, beams) needed to temporarily reinforce the structure for jacking
Zilwaukee Bridge
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Rouge River Bridge
Rouge River Bridge
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Rouge River Bridge
Deck replacement, with some superstructure and substructure repairs. Other large bridges such as Fort Street and Goddard Avenue included
Project was let in November 2016, at a cost of $150 million
Project was complete in 2018
Rouge River Bridge
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US-2 over Cut River
Inspection and Load Rating
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LiDAR Survey was used to determine displacements of plates